Submission

Score: 50

User: wleo.lwo

Problemset: อนุกรม

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-12 12:39:21

#include <stdio.h>

int main() {
    int n;
    scanf("%d", &n);

    int a = 1, b = 1, next;

    if (n == 1 || n == 2) {
        printf("1");
        return 0;
    }

    for (int i = 3; i <= n; i++) {
        next = a + b;
        a = b;
        b = next;
    }

    printf("%d", b);
    return 0;
}